Divider resistor for neutral beam accelerating electrode pulse high-voltage power supply

Abstract

The invention relates to the technical field of high-voltage power electronics, in particular to a divider resistor for a neutral beam accelerating electrode pulse high-voltage power supply, which comprises a support component and resistance wire components, a plurality of resistance wire components are arranged on the support component in a layered manner, and two adjacent layers of resistance wire components are connected in series through a copper wire; each resistance wire assembly comprises a high-power resistance wire and resistance wire binding posts, the two ends of the high-power resistance wire are fixedly connected to the two resistance wire binding posts respectively, the multiple resistance wire binding posts are fixedly connected with the supporting assembly, and the resistance wire is wound and fixed to the supporting assembly; the supporting assemblies and the resistance wire assemblies are arranged in a layered mode, and the adjacent resistance wire assemblies are connected in series through the copper wires, so that uniform distribution of voltage and stability of electrical performance are ensured, and the problem that a traditional voltage dividing device is uneven in voltage dividing is solved.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage power electronics, and in particular to a voltage-dividing resistor used for a neutral beam accelerating pole pulse high-voltage power supply. Background Art

[0002] Nuclear fusion energy is considered to be an important direction for clean energy in the future, among which magnetic confinement nuclear fusion devices (such as tokamaks) are important research platforms for achieving nuclear fusion reactions. In physical experiments of tokamaks, in order to increase the ion temperature of plasma and achieve efficient heating, heating methods such as neutral beam injection are usually required. The core equipment of the neutral beam heating system is the neutral beam ion source accelerator, and its performance is crucial to the reliability and accuracy of the experimental results.

[0003] Neutral beam ion source accelerators usually use a four-electrode hole-type lead-out structure, which includes the first electrode, the second electrode, the third electrode and the fourth electrode. The first electrode is connected to the output end of the pulsed high-voltage power supply, and its potential difference forms the main acceleration voltage; the second electrode potential is usually 70% to 85% of the main acceleration voltage, and this gradient pole voltage is achieved by voltage division. The operation of the accelerator requires a DC high-voltage power supply to provide a stable high-voltage output (about 120kV), while ensuring the precise distribution of the gradient pole voltage to meet the requirements of the heating experiment.

[0004] The existing high-voltage power supply voltage divider devices on the market are mainly designed for conventional load scenarios, which are difficult to meet the special requirements of neutral beam ion source accelerators for high voltage, high-precision voltage division and high insulation performance. In addition, the existing equipment still has problems such as unstable load regulation, high risk of tip discharge and insufficient voltage division accuracy in actual operation, which seriously affect the experimental efficiency and reliability of neutral beam accelerators.

[0005] Therefore, in response to the special needs of the neutral beam accelerator, the development of a high-performance device that can serve as a dummy load and accurately divide the voltage has become an important technical requirement in this field. Summary of the invention

[0006] The technical problem to be solved by the present invention is that the existing neutral beam accelerating pole pulse high voltage power supply cannot simultaneously meet the requirements of high insulation performance, high-precision voltage division and safe and stable operation in terms of high voltage dummy load and gradient pole voltage division. The purpose is to provide a voltage dividing resistor for a neutral beam accelerating pole pulse high voltage power supply, which realizes both the high voltage dummy load function and the gradient pole high voltage voltage division function.

[0007] The present invention is achieved through the following technical solutions:

[0008] A voltage-dividing resistor for a neutral beam accelerating electrode pulse high-voltage power supply comprises: a support component and a resistance wire component, wherein a plurality of the resistance wire components are layered on the support component, and two adjacent layers of the resistance wire components are connected in series through a copper wire;

[0009] Each of the resistance wire assemblies includes a high-power resistance wire and a resistance wire terminal. The two ends of the high-power resistance wire are respectively fixedly connected to the two resistance wire terminals. Multiple resistance wire terminals are fixedly connected to the support assembly, and the resistance wire is wound and fixed on the support assembly.

[0010] Specifically, the support assembly includes: an insulating support plate, a type A epoxy strip and a type B epoxy strip. Multiple type A epoxy strips and two type B epoxy strips are vertically fixed on the insulating support plate. The two type B epoxy strips are adjacent to each other. The two resistance wire terminals in the resistance wire assembly are respectively fixedly connected to the two type B epoxy strips. The type A epoxy strip is provided with a groove for fixing the high-power resistance wire.

[0011] Optionally, adjacent high-power resistance wires are wound alternately in clockwise and counterclockwise directions.

[0012] Furthermore, the support assembly further comprises a plurality of angle steel support frames, which are horizontally arranged at intervals along the vertical direction of the support assembly, and the A-type epoxy strip and the B-type epoxy strip are both fixed by the angle steel support frames.

[0013] Optionally, a universal wheel is installed at the bottom of the support assembly, and a spherical lifting ring is installed at the top of the support assembly.

[0014] Furthermore, the plurality of resistance wire assemblies are divided into two upper and lower partitions, and two adjacent partitions are connected by a high-voltage wire.

[0015] Optionally, the length of the high-power resistance wire is 40 mm, and the distance between two adjacent high-power resistance wires is not less than 10 mm; the interval between two adjacent partitions is 150 mm, and the height of each partition is 1150 mm.

[0016] Specifically, a spherical shielding nut is arranged on the top of the resistance wire terminal.

[0017] Furthermore, the voltage-dividing resistor also includes a full-resistance wiring copper bar, a gradient-pole voltage-dividing wiring copper bar and a ground wire wiring copper bar. The ground wire wiring copper bar is connected to the resistance wire assembly at the bottom, the full-resistance wiring copper bar is connected to the resistance wire assembly at the top, and the gradient-pole voltage-dividing wiring copper bar is connected to the resistance wire assembly in the middle.

[0018] Specifically, the gradient pole voltage-dividing wiring copper bar is connected to the resistance wire component at a position close to 3 / 4 of the height of the voltage-dividing resistor.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] The present invention ensures uniform voltage distribution and electrical performance stability by adopting a layered arrangement of support components and resistance wire components, and connecting adjacent resistance wire components in series through copper wires, thereby solving the problem of uneven voltage distribution in traditional voltage dividers. The mechanical stability of the device is enhanced by the fixed connection of the high-power resistance wire and the resistance wire terminal and the design of the resistance wire being wound and fixed on the support component, thereby avoiding structural deformation under high-voltage environments. The optimized combination of the support component and the resistance wire component effectively improves the insulation capacity of the device and solves the problem of tip discharge and insufficient voltage resistance in traditional devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation of the embodiments of the present invention.

[0022] Figure 1 The figure is a front view of a voltage-dividing resistor for a neutral beam accelerating electrode pulse high-voltage power supply according to the present invention, in which the resistance wire is not installed.

[0023] Figure 2 This is a right view of a voltage-dividing resistor for a neutral beam accelerating electrode pulse high-voltage power supply according to the present invention, in which the resistance wire is not installed.

[0024] Figure 3 It is a rear view of a voltage-dividing resistor for a neutral beam accelerating electrode pulse high-voltage power supply according to the present invention, in which the resistance wire is not installed.

[0025] Figure 4 This is a left view of a voltage-dividing resistor for a neutral beam accelerating electrode pulse high-voltage power supply according to the present invention, in which the resistance wire is not installed.

[0026] Figure 5 The figure is a top view of a voltage divider resistor for a neutral beam accelerating electrode pulse high voltage power supply according to the present invention, in which a resistance wire has been installed.

[0027] Figure 6 The figure is a front view of a voltage-dividing resistor for a neutral beam accelerating electrode pulse high-voltage power supply according to the present invention, in which a resistance wire has been installed.

[0028] Description of the drawings: 1-insulating support plate; 2-A-type epoxy strip; 3-B-type epoxy strip; 4-resistance wire terminal; 5-angle steel support frame; 6-spherical lifting ring; 7-full resistance wiring copper bar; 8-gradient pole voltage dividing wiring copper bar; 9-ground wire wiring copper bar; 10-universal wheel; 11-high-power resistance wire; 14-high-voltage wire; 15-spherical shielding nut. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation methods. It is understood that the specific implementation methods described herein are only used to explain the relevant content, rather than to limit the present invention.

[0030] It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0031] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the absence of conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Embodiment 1

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the voltage-dividing resistor provided in this embodiment realizes the voltage-dividing and dummy-loading functions of the neutral beam accelerating electrode pulse high-voltage power supply through the combination of the support assembly and the resistance wire assembly. The resistance wire assembly is installed on the support assembly in a layered manner, and adjacent resistance wire assemblies are connected in series through copper wires to form a voltage-dividing network with high insulation performance and high stability.

[0036] A voltage-dividing resistor for a neutral beam accelerating electrode pulse high-voltage power supply comprises: a support component and a resistance wire component, wherein a plurality of resistance wire components are layered on the support component, and two adjacent layers of resistance wire components are connected in series through copper wires; the support component is used to fix the resistance wire component and provide mechanical support

[0037] Each resistance wire assembly includes a high-power resistance wire 11 and resistance wire terminals 4. The two ends of the high-power resistance wire 11 are fixedly connected to two resistance wire terminals 4 respectively. Multiple resistance wire terminals 4 are fixedly connected to the support assembly, and the resistance wire is wound and fixed on the support assembly.

[0038] The multiple resistance wire components are divided into two upper and lower partitions, and the two adjacent partitions are connected by a high-voltage wire 14 to achieve electrical continuity and voltage conduction between the partitions. The high-voltage wire 14 has good insulation performance and can adapt to the operation requirements in a high-voltage environment. The adjacent partitions are separated by a reasonable distance to avoid insulation breakdown caused by electric field concentration during high-voltage operation.

[0039] At the same time, the partition design reduces the voltage concentration pressure in a single area and improves the voltage resistance and safety of the overall voltage divider resistor.

[0040] Embodiment 2

[0041] The design of the support assembly in the present invention provides stable mechanical support and efficient electrical performance support for the resistance wire assembly, while achieving an organic combination of insulation and structural stability.

[0042] The support assembly includes: an insulating support plate 1, an A-type epoxy strip 2 and a B-type epoxy strip 3. Multiple A-type epoxy strips 2 and two B-type epoxy strips 3 are vertically fixed on the insulating support plate 1. The two B-type epoxy strips 3 are arranged adjacent to each other. The two resistance wire terminals 4 in the resistance wire assembly are respectively fixedly connected to the two B-type epoxy strips 3. The A-type epoxy strip 2 is provided with grooves for fixing the high-power resistance wire 11, and the grooves are processed at equal distances for embedding and fixing the high-power resistance wire 11 to prevent the resistance wire from shifting due to vibration or thermal effects of operation.

[0043] Adjacent high-power resistor wires are wound alternately clockwise and counterclockwise, which reduces the increase in inductance caused by the same-direction connection of the resistor wires by optimizing the current path and electrical distribution, while improving the uniformity and stability of the overall electrical performance. 12 in the figure is a copper wire on one of the B-type epoxy strips 3, and 13 is a copper wire on another B-type epoxy strip 3.

[0044] The support assembly further includes a plurality of angle steel support frames 5 , which are horizontally arranged at intervals along the vertical direction of the support assembly, and the A-type epoxy strip 2 and the B-type epoxy strip 3 are both fixed by the angle steel support frames 5 .

[0045] The angle steel support frame 5 adopts a three-section structure, which is located at the top, middle and bottom of the bracket. The top is used to install the spherical lifting ring 6, which is convenient for hanging and installing the equipment. The middle part provides horizontal fixed support for the A-type epoxy strip 2 and the B-type epoxy strip 3, while enhancing the overall rigidity. The bottom is fixed with the insulating support plate 1 to enhance the mechanical stability of the device. The angle steel support frame 5 adopts the chamfering method at the four corners of the support frame to make it round and smooth, avoiding the tip discharge of the support frame in the high-voltage operating environment.

[0046] The bottom of the support assembly is equipped with universal wheels 10 (four optional) for carrying and moving the device, enhancing the adaptability of the device in different usage scenarios. The top of the support assembly is equipped with spherical lifting rings 6 (two diagonally distributed) for lifting or fixing the device. The spherical lifting rings 6 avoid the risk of discharge at the tip of the traditional lifting ring.

[0047] Embodiment 3

[0048] According to the voltage output value of the accelerating high-voltage power supply, the insulation withstand voltage value and the total resistance value of the dummy load are calculated, and the key parameters such as the resistance value, quantity, and current of the resistance wire are selected according to the calculation results; the size of the entire dummy load is calculated based on the above calculation results, and the angle steel support frame 5 is processed according to the size of the dummy load, and the epoxy strip is selected and the length of the resistance wire is determined.

[0049] The length of the high-power resistance wire 11 is 40 mm, ensuring that it has appropriate power carrying capacity during high-voltage operation.

[0050] The distance between two adjacent high-power resistance wires 11 is not less than 10 mm, and the insulation withstand voltage of adjacent resistance wire layers is greater than 10 kV, thereby avoiding insulation breakdown caused by excessive electric field concentration, optimizing the overall heat dissipation effect, and improving the operating stability of the equipment.

[0051] The interval between two adjacent partitions is 150mm. Since the insulation distance between the two layers is greater than 150mm, if the resistance wire has 100 layers, the DC withstand voltage between the output end and the ground end of the entire voltage divider resistance can be higher than 150kV, which fully meets the needs of the system. In addition, during the winding and installation of the resistance wire, the adjacent high-power resistance wires are wound alternately clockwise and counterclockwise, which can reduce the increase in inductance caused by the same-direction winding of the resistance wire.

[0052] The height of each partition is 1150 mm, so the number of resistance wire assemblies is about 200. The number of high-power resistance wires 11 and resistance wire terminals 4 is obtained accordingly.

[0053] A spherical shielding nut 15 is provided on the top of the resistance wire terminal 4, which reduces the tip discharge phenomenon and avoids the local breakdown and arc problems caused by the concentrated electric field in the high-voltage operating environment.

[0054] Since the voltage-dividing resistor has nearly 100 voltage-dividing taps, the voltage-dividing value ratio can be accurate to 1%, and the voltage-dividing value can be changed at will according to the requirements of the neutral beam gradient pole.

[0055] Embodiment 4

[0056] In the voltage-dividing resistor design of the present invention, accurate control of the voltage division of the high-voltage power supply and satisfaction of different voltage requirements are achieved by setting a full-resistance wiring copper bar 7, a gradient-pole voltage-dividing wiring copper bar 8 and a ground-wire wiring copper bar 9. The voltage-dividing resistor also includes a full-resistance wiring copper bar 7, a gradient-pole voltage-dividing wiring copper bar 8 and a ground-wire wiring copper bar 9.

[0057] The ground wire copper bar 9 is connected to the resistance wire assembly at the bottom to ground the lowest potential.

[0058] The full resistance wiring copper bar 7 is connected to the resistance wire assembly located at the top, and is mainly used to output the total voltage division value of the full resistance.

[0059] The gradient pole voltage-dividing wiring copper bar 8 is connected to the resistance wire assembly located in the middle. Specifically, the gradient pole voltage-dividing wiring copper bar 8 is connected to the resistance wire assembly near the 3 / 4 position of the voltage-dividing resistor height, providing a voltage-dividing value that meets the gradient pole voltage requirement. Its design matches the gradient pole voltage requirement of the neutral beam accelerating pole in the nuclear fusion device, and the voltage-dividing accuracy is high and stable.

[0060] The gradient pole voltage divider wiring copper bar 8 is connected to the 3 / 4 position of the voltage divider resistor height, where the resistor wire assembly extracts voltage to ensure that the output of the gradient pole voltage meets the 70%-85% main acceleration voltage range required for actual operation of the nuclear fusion device.

[0061] In addition, in practice, the connection position of the gradient pole voltage-dividing wiring copper bar 8 can also be adjusted in time according to the experimental situation, so as to adjust the resistance value of the voltage-dividing resistor.

[0062] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0064] It should be understood by those skilled in the art that the above embodiments are only for the purpose of clearly illustrating the present invention, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. A voltage dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply, characterized in that: include: A support component and a resistance wire component, wherein a plurality of the resistance wire components are layered on the support component, and two adjacent layers of the resistance wire components are connected in series via a copper wire; Each of the resistance wire assemblies comprises a high-power resistance wire (11) and a resistance wire terminal (4), the two ends of the high-power resistance wire (11) are respectively fixedly connected to two of the resistance wire terminals (4), a plurality of resistance wire terminals (4) are all fixedly connected to the support assembly, and the resistance wire is wound and fixed on the support assembly.

2. The voltage-dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply according to claim 1, characterized in that: The support assembly comprises: an insulating support plate (1), an A-type epoxy strip (2) and a B-type epoxy strip (3); a plurality of the A-type epoxy strips (2) and two B-type epoxy strips (3) are vertically fixed on the insulating support plate (1); the two B-type epoxy strips (3) are arranged adjacent to each other; the two resistance wire terminals (4) in the resistance wire assembly are respectively fixedly connected to the two B-type epoxy strips (3); and a groove for fixing the high-power resistance wire (11) is provided on the A-type epoxy strip (2).

3. The voltage-dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply according to claim 1, characterized in that: Adjacent high-power resistance wires are wound alternately clockwise and counterclockwise.

4. The voltage-dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply according to claim 2, characterized in that: The support assembly further comprises a plurality of angle steel support frames (5), wherein the plurality of angle steel support frames (5) are horizontally arranged at intervals along the vertical direction of the support assembly, and the A-type epoxy strip (2) and the B-type epoxy strip (3) are both fixed by the angle steel support frames (5).

5. The voltage-dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply according to claim 2, characterized in that: A universal wheel (10) is installed at the bottom of the support assembly, and a spherical lifting ring (6) is installed at the top of the support assembly.

6. The voltage-dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply according to claim 1, characterized in that: The plurality of resistance wire assemblies are divided into two upper and lower partitions, and two adjacent partitions are connected via a high-voltage wire (14).

7. The voltage-dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply according to claim 6, characterized in that: The length of the high-power resistance wire (11) is 40 mm, and the distance between two adjacent high-power resistance wires (11) is not less than 10 mm; the interval between two adjacent partitions is 150 mm, and the height of each partition is 1150 mm.

8. The voltage-dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply according to claim 1, characterized in that: A spherical shielding nut (15) is arranged on the top of the resistance wire terminal (4).

9. The voltage-dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply according to claim 1, characterized in that: The invention also comprises a full resistance connection copper bar (7), a pressure connection copper pole voltage connection copper bar (8) and a ground connection copper bar (9), wherein the ground connection copper bar (9) is connected to the resistance wire assembly at the bottom, the full resistance connection copper bar (7) is connected to the resistance wire assembly at the top, and the gradient pole voltage connection copper bar (8) is connected to the resistance wire assembly at the middle.

10. The voltage-dividing resistor for a neutral beam accelerating electrode pulse high voltage power supply according to claim 9, characterized in that: The gradient pole voltage-dividing wiring copper bar (8) is connected to the resistance wire assembly at a position close to 3 / 4 of the voltage-dividing resistor height.

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